Improvement in carving-machines



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Carving Patented June 17, 1873.

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H. THUMAS. Carving-Machines.

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HENRI THOMAS, OF BROOKLYN, E. D., NEW YORK.

IMPROVEMENT IN CARVlNG-MACHINES.

Specification forming part of Letters Patent No.

139,980, dated June 17, 1873; application filed April 19, 1873.

To all whom it may concern:

Be it known that I, HENRI TrioMAs, of' Brooklyn, E. D., in the county ofKings and State of New York, have invented a new Vand useful Improvementin Carving-Machines, of which the following is a specification:

In my improved carving-machine two centering holdersl are employed, onefor holding the pattern and the other the work, on sliding beds arrangedon quarter-circular ways on the top of the table, which meet each otherat the middle of the back of the table, and diverge therefrom to thefront side 5 and above these are the tool and guide or dictator, whichhangs vertically from their supports in the free ends of horizontal armswhich are pivoted to a block over the table near where the ways of theholders meet, in such an arrangement that they traverse the work andpattern in the longitudinal axes of the center holders, and the Work andpattern traverse the paths in which the tool and guide swing, so thatthe requisite motions are obtained for the tools to act on all parts ofany surface in the holders. Different sides or surfaces are presentedbyturning the work and pattern in the holding centers. The block towhich the pattern and tool-arms are pivoted is made to slide verticallyon a support, with a screw under the control of the operator; the armsof the tool and guide are also at the control of the atten dant by meansof a sliding block to which they are connected, for being swung to movethe tools, as required in the progress of the work; and the bed-platesofthe centerholders are caused to swing forward and backward on theirways by a hand-screw and a traversing nut, to which they are suitablyconnected.

Figure 1 is a plan view of my improved carving-machine. Fig. 2 is a planof the bottom of it. Fig. 3 is atransverse section taken on the line .rw, of Fig. 2, and Fig. 4 is afrontelevation, with some parts sectioned.

Similar letters of reference indicate corresponding parts.

A represents the bench-top on which are the circular ways C, comprisingabout a quarter of a circle each; they begin at the front ofthe table ateach side of the center, and meet together at the other ends on thetransverse center of the table near the back side. D

represents the bed-plate of the work-holding centers E. F is thebed-plate of the patternholding centers Gr. These holders are arrangedon their respective ways so that they radiate to a central point at thefront of the middle of the table where the attendant stands. As theplatforms swing forward and back on the ways, they are actuated by theradius bars H below the table, pivoted at I, and connected by links J,and toggle-bars K, with the nut L, on the adjustingscrew M, whichextends to the front of the machine, and has a handwheel, N, thereat, bywhich to turn it and work the holders alike. O is the toolbarrying arm.P is the guide or dictator-arm; the first is pivoted to the verticallyadjustingblock Q, at R, so as to swing the toolspindlc R forward andbackward across the path of the work-carrying centers E; the 'other ispivoted to said block at S, to swing across the path of thepattern-carryin g centers Gr G, for moving the dictators l over thepattern. These arms are connected by links U, and toggle-jointed bars V,to the slide W, on the bar X, projecting from the block Q towards thefront of the machine, so that the operator can conveniently actuate theslide W by hand to swing both arms exactly alike. The block Qis fittedon the vertical support Y to slide up and down to adjust the toolsvertically to the work and pattern, and is actuated by the feed-screw Z,which gears with the hand crankshaft Z below the table. The pattern andthe work are turned by the centers from time to time to shift the facesto the tools, and they are held by the templates a and springholders b.

It will be seen that, by the movement of the center-holders and thetool-carryin g arms, the tools can be brought to all parts of thesurfaces of the work and pattern in the most ready manner, and by thevertical adjustment all the changes necessary on account of variation inthe height of the pattern can be easily accomplished. p

All these changes are made by the hand-l wheel N, crankshaft Z', or theslide W, which are grouped at the front of the table, where the operatorcan, with greatest convenience, watch the patterns and adjust the toolsas required.

The tool-spindle is to be revolved by a belt Working from a pulley at donto the pulley e on the spindle, the pulley d to be turned in anysuitable or approved way.

It will be noted that the work produced will be in reverse of thepattern-that is to say, the parts on the right-hand side of the patternwill be represented on the left-hand side of the Work, and vice versa.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of the sliding work and patterncarrying centers, and the vertically adjustable and horizontallyswinging toolcarrying arms, all constructed and arranged and operatingsubstantially as specified.

